SiBE12-908
Troubleshooting
Service Diagnosis
157
Troubleshooting
Check No.02
Refer to P.162
(R9456)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
YES
YES
YES
Modify supply voltage.
Replace heater unit.
Replace heater unit.
Replace the thermistor.
*For details, refer to
PH
troubleshooting
Replace indoor control
PCB (A1P).
*Main relay could be
damaged.
When the main relay
(MRM10) is damaged,
heater, rotor and
dehumidification fan do not
run.
Is the supply voltage
appropriate?
Power supply OFF
YES
NO
NO
NO
NO
Is the heater
resistance
appropriate?
At normal temperature:
61.0
Ω
±3%
[ ]
Is thermal fuse blown?
NO
YES
Check No.02
Is a resistance of
thermal thermistor at
humidification fan
outlet appropriate?
Is heater well cooled?
Cool it
down.
Measure resistance between
heater connectors